DE1902435A1 - Device for low-pressure manifold injection for motor vehicles - Google Patents
Device for low-pressure manifold injection for motor vehiclesInfo
- Publication number
- DE1902435A1 DE1902435A1 DE19691902435 DE1902435A DE1902435A1 DE 1902435 A1 DE1902435 A1 DE 1902435A1 DE 19691902435 DE19691902435 DE 19691902435 DE 1902435 A DE1902435 A DE 1902435A DE 1902435 A1 DE1902435 A1 DE 1902435A1
- Authority
- DE
- Germany
- Prior art keywords
- motor vehicles
- low
- injection
- manifold injection
- pressure manifold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/02—Fuel-injection apparatus characterised by being operated electrically specially for low-pressure fuel-injection
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
B e s c h r e i b u n g Einrichtung zur Niederdruck-Saugrohreinspritzung für Kraftfahrzeuge Die Erfindung betrifft eine Sinrichtung tur Niederdruck-Saugrohreinspritzung des Kraftstoffes für Kraftfahrzeuge. D e c e r i n g e Device for low-pressure intake manifold injection for motor vehicles The invention relates to a Sinrichtung tur low-pressure intake manifold injection of fuel for motor vehicles.
Bei dieser Art der Gemischaufbereitung wird der Kraftstoff mittels einer der Zylinderzahl entsprechenden Anzahl von Spritzdüsen mit Drücken im Bereich von 1 - 3 atü vor die Einlaßventile des Motors in das Saugrohr gespritzt. Bei modernen Einrichtungen werden elektronisch gesteuerte, elektromagnetisch geschaltete Ventile benutzt, denen der Kraftstoff mit konstantem Druck zugeführt wird, wobei die Kraftstoffdosierung dann durch veränderliche Bemessung der Ventilöffnungszeiten erfolgt.With this type of mixture preparation, the fuel is by means of a number of spray nozzles corresponding to the number of cylinders with pressures in the range injected into the intake manifold from 1 - 3 atmospheres in front of the engine's intake valves. With modern Devices are electronically controlled, electromagnetically switched valves used, to which the fuel is supplied at constant pressure, with the fuel metering then takes place through variable dimensioning of the valve opening times.
Man war bisher der Ansicht, daß es zu optimalen Erg@bnissen hinsichtlich Kraftstoffverbrauch und Abgasreinigung führe, wenn die Einspritzung des Kraftstoffes in den Saughub erfolgt. Dementsprechend hat man den Öffnungsbeginn für alle Einspritzventile unterschiedlich vorgesehen, d. h., während eines Arbeitszyklus (720° KW) werden bei einem Vierzylindermotor vier zeitlich gegeneinander verschobene Öffnungsimpulse benötigt.It was previously of the opinion that it would lead to optimal results with regard to Fuel consumption and emission control result when injecting the fuel takes place in the suction stroke. Accordingly, you have the start of opening for all injectors provided differently, d. i.e., during a duty cycle (720 ° CA) in the case of a four-cylinder engine, four opening impulses shifted in time against each other needed.
Allerdings hat man auch schon je zwei Einspritzventile synchron betrieben. eg geschah aber lediglich zur Verbilligung der lektronischen Steuerung und unter vermeintlichen Verzicht auf die technisch optimale Lösung.However, two injection valves each have already been operated synchronously. eg happened only to make the electronic control cheaper and below alleged abandonment of the technically optimal solution.
Die Erfindung beruht auf der Überlegung und deren meßtechnischer Nachprüfung, daß die Abgaszusammensetzung durch die.Wahl des Einspritzzeitpunktes innerhalb eines Arbeitszyklus (7200 KW) kaum beeinflußt wird und daß auch der spezifische Kraftstoffverbrauch nicht wesentlich davon abhängt.The invention is based on the consideration and its metrological verification, that the exhaust gas composition by the choice of the injection time within a Duty cycle (7200 KW) is hardly influenced and that also the specific fuel consumption does not depend significantly on it.
Die Erfindung schlägt daher für eine Einspritzeinrichtung mit Einspritzventilen veränderbare Öffnungszeiten vor, den Öffnungsbeginn aller Ventile synchron zu steuern. Die Ans lösung der Einspritzung kann durch einen Nocken in Verbindung mit einem elektrischen Kontaktsatz erfolgen.The invention therefore proposes an injection device with injection valves changeable opening times to control the start of opening of all valves synchronously. The solution to the injection can be achieved by a cam in conjunction with a electrical contact set.
An einem Ausführungsbeispiel soll die Erfindung nachfolgend erläutert werden.The invention is explained below using an exemplary embodiment will.
In der beigefügten Figur ist schematisch eine elektronisch gesteuerte Einspritzeinrichtung nach der Erfindung dargestellt.In the attached figure is an electronically controlled one schematically Injection device according to the invention shown.
Der Kraftstoff wird aus dem Tank 1 über ein Filter 2 von einer Exzenterpumpe 3 angesaugt und mit konstantem Druck in die Zuleitungen 4 zu dOn Einspritzventilen 5 gepumpt. Zur Konstanthaltung des vor den Einspritzventilen 5 stehenden Drucks auf ca. 2 atü dienen ein Überdruckventil 6 und eine Rücklaufleitung 7¢ Das elektronische Steuergerät 8 zur Ermittlung der veränderbaren Öffnungszeit der Ventile ist lediglich schematisch angedeutet. Es erhält seine Steuerimpulse durch verschiedene Meßinstrumente und Schaltungsclemente, wie Saugrohr- Bruckfühlor, Temperaturfühler und Drosselhlappenschalter, deren schaltungstechnische Einzelheiten für die vorliegende Erfindung jedoch nicht wesentlich sind. Die Impulsauslösung des Steuergerätes @ erfolgt durch den Zündverteiler 9, wobei es nach der Erfindung nicht auf die Phasenlage dieses auslösenden Impulses ankommt und es forner nicht erferderlich ist, diesem Ispuls im Sten@@gerä@ entsprechend der Ansah@ d@r Einspritzventile zu verviclfältigen. Die elektronische @@@@@ektung wird somit wesentlich dadurch vereinfacht, daß sie @@@ord eines Arbeitszyklus @ @ einmal einen Öffnungsimpuls zugleich an alle Einspritzventile zu geben braucht.The fuel is drawn from the tank 1 via a filter 2 by an eccentric pump 3 sucked in and with constant pressure in the supply lines 4 to dOn injection valves 5 pumped. To keep the pressure in front of the injection valves 5 constant a pressure relief valve 6 and a return line 7 ¢ the electronic one serve at approx. 2 atm Control unit 8 for determining the variable opening time of the valves is only indicated schematically. It receives its control impulses from various measuring instruments and circuit elements such as intake manifold pressure sensors, temperature sensors and throttle valve switches, however, their circuitry details for the present invention are not are essential. The control unit @ is triggered by the ignition distributor 9, whereby according to the invention it does not affect the phase position of this triggering pulse arrives and it is not necessary forner, this Ispuls in the Sten @@ gerä @ accordingly the view @ d @ r injectors to duplicate. The electronic @@@@@ ektung is thus considerably simplified by the fact that it @@@ ord of a work cycle @ @ needs to give an opening impulse once to all injection valves at the same time.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691902435 DE1902435A1 (en) | 1969-01-18 | 1969-01-18 | Device for low-pressure manifold injection for motor vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691902435 DE1902435A1 (en) | 1969-01-18 | 1969-01-18 | Device for low-pressure manifold injection for motor vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1902435A1 true DE1902435A1 (en) | 1970-08-13 |
Family
ID=5722752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691902435 Pending DE1902435A1 (en) | 1969-01-18 | 1969-01-18 | Device for low-pressure manifold injection for motor vehicles |
Country Status (1)
Country | Link |
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DE (1) | DE1902435A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2521222A1 (en) * | 1982-02-10 | 1983-08-12 | Fuji Heavy Ind Ltd | FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINE |
WO1993009050A1 (en) * | 1991-10-28 | 1993-05-13 | Minnesota Mining And Manufacturing Company | Tape applying device |
-
1969
- 1969-01-18 DE DE19691902435 patent/DE1902435A1/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2521222A1 (en) * | 1982-02-10 | 1983-08-12 | Fuji Heavy Ind Ltd | FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINE |
WO1993009050A1 (en) * | 1991-10-28 | 1993-05-13 | Minnesota Mining And Manufacturing Company | Tape applying device |
US5269871A (en) * | 1991-10-28 | 1993-12-14 | Minnesota Mining And Manufacturing Company | Tape applying device |
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